Get tech support for your O2 issues

Mute when I call numbers beginning 03

When I try to call certain numbers beginning with 03.. I do get through but the party at the other end can't hear me i.e. I am on mute. I asked the party at the other end if they knew what the problem is & they suggested phone OS upgrade - which I di...

Poor connection

I'm having trouble connecting to the 5G network outside. On WiFi, at shops, cafes supermarkets I can connect without problems.For the last 12 months, I have noticed that it is very difficult to connect to a 5G network (Mask) anywhere outside. I've tr...

Call forwarding changed to a number I do not know.

So last September I purchased a new iPhone outright via Apple. done eSIM transfer that messed up, didn’t get fixed until December, at this point comms ombudsman was bought in to help which is sorted, but they couldn’t fix the issue (my number was wor...

Resolved! Customer services number

Not really a tech question, but none of the options fitted.All i want is the number i call for customer services. The virtual assistant is useless for such an incredibly basic question, and it seems to be nowhere on the website. They even have the ch...

Resolved! PUK code

Hello, i need a PUK code for my 2009 Nokia. Can anyone help please? Thanks, rowan

Resolved! Internal migration

Hi, I tried to upgrade via another mobile phone company but they put through a new contract.I called customer service and was advised I could do an internal migration and cancel the old contract but there was a fee to pay for the remaining airtime.I ...

Receiving SMS in South Africa

I'm in South Africa and can't receive SMS on my UK phone with an O2 Sim. The phone settings are:Airplane mode Off,mobile data On,data roaming On,.Wifi calling On.local network MTN-SA (have also tried Vodacom-SA and CellC). This is seriously inconveni...

Samsung S25 Ultra Whats App transfer of data/backup not working

I got the Samsung S25 ultra last week. I have transferred over everything but the smart switch said it can't transfer anything from whatsapp from my S21. I backed up all my data repeatedly on whatsapp and the files are there I think on the S21, but i...

I am not able to access data and having poor network in E14, Canary Wharf area since one month

I am not able to access data and having poor network in E14, Canary Wharf area since one month. Not able to do access the internet or do a WhatsApp video call. Also unable to do a normal call as there is poor network where I work. This was not before...

I am not able to call or receive calls or texts

I am in Italy and I am not able to receive or make calls or texts

O2

Forum Posts